The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 29, 1992
Filed:
Nov. 04, 1991
Hidehiko Kikuchi, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
This invention consists of a power conversion device wherein a circuit comprising semiconductor power elements and fuses connected in series with these, and feedback diodes connected in antiparallel with said semiconductor power elements is connected as a bridge, the A.C. terminals of said bridge circuit are connected to an A.C. power source, and the D.C. terminals are connected to a D.C. power source provided with a capacitor, characterized in that said feedback diodes are connected in antiparallel with the series circuits of said semiconductor power elements and fuses. By means of the layout described above, the fuses are prevented from melting when a D.C. short-circuit occurs, since the current that flows from the A.C. terminal to the D.C. power source on D.C. short-circuiting flows through a feedback diode or a bypass diode, and not to the fuses.